Question:
Which crude drug is used as an expectorant?
Which crude drug is used as an expectorant?
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An expectorant is a drug that loosens mucus in the airways so a person can cough it out more easily. In pharmacognosy, you should know the main therapeutic use of each common crude drug.
Updated On: Jun 24, 2026
- Liquorice
- Digitalis
- Belladonna
- Senna
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The Correct Option is A
Solution and Explanation
Concept:
An expectorant is a drug that loosens mucus in the airways so a person can cough it out more easily. In pharmacognosy, you should know the main therapeutic use of each common crude drug.
Step 1:
Look at what each drug is famous for. Liquorice (Glycyrrhiza glabra) is well known for soothing the throat and acting as a demulcent and expectorant, which is why it is added to many cough syrups and lozenges.
Step 2:
Now rule out the others. Digitalis is a cardiac drug (it strengthens the heartbeat). Belladonna is an anticholinergic (it dries secretions and relaxes smooth muscle), basically the opposite of an expectorant. Senna is a stimulant laxative used for constipation.
Step 3:
Only Liquorice fits the description of an expectorant, so that is the answer.
Answer: Option (1) — Liquorice.
An expectorant is a drug that loosens mucus in the airways so a person can cough it out more easily. In pharmacognosy, you should know the main therapeutic use of each common crude drug.
Step 1:
Look at what each drug is famous for. Liquorice (Glycyrrhiza glabra) is well known for soothing the throat and acting as a demulcent and expectorant, which is why it is added to many cough syrups and lozenges.
Step 2:
Now rule out the others. Digitalis is a cardiac drug (it strengthens the heartbeat). Belladonna is an anticholinergic (it dries secretions and relaxes smooth muscle), basically the opposite of an expectorant. Senna is a stimulant laxative used for constipation.
Step 3:
Only Liquorice fits the description of an expectorant, so that is the answer.
Answer: Option (1) — Liquorice.
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